What song should my band play?

So in Music we have to do a musical futures piece we have to perform a
popular piece from today's music scene for example lady gaga, beyonce
and katie perry. But we have no idea what to do. You have to perform
the music with everyone playing an instrument whilst others singing.
The instruments that can be used are piano, drum, bass guitar,
electric guitar, xylophone, glockenspiel, vocal and tambourine. What
song is good to do that is easy, avaliable sheet music and the ability
to get us a great grade???

with your answer can you give: title, artist, link on youtbe, sheet
music and instruments neeeded.

Thank You xx